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    <div class="book" data-level="2.5" data-chapter-title="中断处理过程" data-filepath="2-interruption/中断处理过程.md" data-basepath=".." data-revision="Sat Nov 14 2015 21:21:46 GMT+0800 (CST)">
    

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                            <b>1.5.</b>
                        
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                            <b>1.8.</b>
                        
                        布尔处理类指令
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                            <b>2.</b>
                        
                        中断系统
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                            <b>2.1.</b>
                        
                        中断允许寄存器 IE
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                            <b>2.2.</b>
                        
                        中断优先级寄存器 IP
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                            <b>2.3.</b>
                        
                        定时/计数器控制寄存器 TCON
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                            <b>2.4.</b>
                        
                        T/C的模式寄存器 TMOD
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                            <b>2.5.</b>
                        
                        中断处理过程
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                            <b>2.6.</b>
                        
                        定时计数器
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                            <b>3.</b>
                        
                        串行通信
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                            <b>3.1.</b>
                        
                        几个知识点
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                            <b>3.2.</b>
                        
                        几个用到的寄存器
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                        串行通信过程及实例
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                        存储器的扩展
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                            <b>4.2.</b>
                        
                        与外设的数据传输 8255
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                            <b>4.3.</b>
                        
                        数模转换器 DAC0832
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                        <h3 id="&#x4E2D;&#x65AD;&#x5904;&#x7406;&#x8FC7;&#x7A0B;">&#x4E2D;&#x65AD;&#x5904;&#x7406;&#x8FC7;&#x7A0B;</h3>
<hr>
<h4 id="&#x5355;&#x7247;&#x673A;&#x54CD;&#x5E94;&#x4E2D;&#x65AD;&#x7684;&#x8FC7;&#x7A0B;">&#x5355;&#x7247;&#x673A;&#x54CD;&#x5E94;&#x4E2D;&#x65AD;&#x7684;&#x8FC7;&#x7A0B;</h4>
<ol>
<li>&#x7531; <code>TFi</code> &#x3001; <code>IEi</code> &#x53D1;&#x51FA;&#x4E2D;&#x65AD;&#x8BF7;&#x6C42;<sup><a href="#fn_1" id="reffn_1">1</a></sup>&#xFF1B;</li>
<li><code>EA</code> &#x4E0E;&#x9700;&#x8981;&#x54CD;&#x5E94;&#x7684;&#x4E2D;&#x65AD;&#x6E90;&#x7684;&#x63A7;&#x5236;&#x4F4D;&#xFF08;&#x89C1;<a href="&#x4E2D;&#x65AD;&#x5141;&#x8BB8;&#x5BC4;&#x5B58;&#x5668;.html">&#x4E2D;&#x65AD;&#x5141;&#x8BB8;&#x5BC4;&#x5B58;&#x5668;</a>&#xFF09;&#x5747;&#x5904;&#x4E8E; <code>&#x5F00;</code> &#x72B6;&#x6001;&#xFF08;&#x4E3A; <code>1</code> &#xFF09;&#xFF1B;</li>
<li>&#x5355;&#x7247;&#x673A;&#x5728;&#x6BCF;&#x4E2A;&#x673A;&#x5668;&#x5468;&#x671F;&#x7684; S5P2 &#x91C7;&#x6837;&#x4E2D;&#x65AD;&#xFF0C;&#x5728;&#x4E0B;&#x4E00;&#x4E2A;&#x673A;&#x5668;&#x5468;&#x671F;&#x5BF9;&#x91C7;&#x6837;&#x5230;&#x7684;&#x4E2D;&#x65AD;&#x8FDB;&#x884C;&#x4F18;&#x5148;&#x7EA7;&#x5904;&#x7406;&#xFF08;&#x89C1;<a href="&#x4E2D;&#x65AD;&#x4F18;&#x5148;&#x7EA7;&#x5BC4;&#x5B58;&#x5668;.html">&#x4E2D;&#x65AD;&#x4F18;&#x5148;&#x7EA7;&#x5BC4;&#x5B58;&#x5668;</a>&#xFF09;&#xFF1B;</li>
<li>&#x5BF9;&#x4E8E;&#x5DF2;&#x7ECF;&#x786E;&#x8BA4;&#x7684;&#x4E2D;&#x65AD;&#x6E90;&#x8FD8;&#x5FC5;&#x987B;&#x6EE1;&#x8DB3;&#x4EE5;&#x4E0B;&#x4E09;&#x70B9;&#xFF1A;<ol>
<li>&#x5F53;&#x524D;&#x5355;&#x7247;&#x673A;&#x4E0D;&#x5728;&#x54CD;&#x5E94;&#x540C;&#x7EA7;&#x6216;&#x9AD8;&#x7EA7;&#x522B;&#x7684;&#x4E2D;&#x65AD;&#x7A0B;&#x5E8F;&#xFF1B;</li>
<li>&#x73B0;&#x884C;&#x7684;&#x673A;&#x5668;&#x5468;&#x671F;&#x662F;&#x5F53;&#x524D;&#x6307;&#x4EE4;&#x7684;&#x6700;&#x540E;&#x4E00;&#x4E2A;&#x673A;&#x5668;&#x5468;&#x671F;&#xFF1B;</li>
<li>&#x5F53;&#x524D;&#x6307;&#x4EE4;&#x4E0D;&#x662F; <code>RET</code> &#x3001; <code>RETI</code> &#x3001; &#x8BBF;&#x95EE; <code>IE</code> &#x3001; <code>IP</code> &#x7684;&#x6307;&#x4EE4;<sup><a href="#fn_&#x6CE8;" id="reffn_&#x6CE8;">&#x6CE8;</a></sup>&#xFF1B;</li>
</ol>
</li>
<li>&#x5355;&#x7247;&#x673A;&#x5C06; <code>PC</code> &#x503C;&#x538B;&#x5165;&#x6808;&#xFF0C;&#x5C06;&#x4E2D;&#x65AD;&#x6E90;&#x7684;&#x5165;&#x53E3;&#x5730;&#x5740;&#x88C5;&#x5165; <code>PC</code> &#xFF0C;&#x5404;&#x4E2D;&#x65AD;&#x6E90;&#x7684;&#x5165;&#x53E3;&#x5730;&#x5740;&#x5982;&#x4E0B;&#xFF1A;</li>
</ol>
<table>
<thead>
<tr>
<th style="text-align:center">&#x540D;&#x79F0;</th>
<th style="text-align:center">&#x6807;&#x8BC6;</th>
<th style="text-align:center">&#x5165;&#x53E3;&#x5730;&#x5740;</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:center">&#x5916;&#x90E8;&#x4E2D;&#x65AD; <code>0</code></td>
<td style="text-align:center"><span style="text-decoration:overline"><code>INT0</code></span></td>
<td style="text-align:center"><code>0003H</code></td>
</tr>
<tr>
<td style="text-align:center">&#x5B9A;&#x65F6;/&#x8BA1;&#x6570;&#x5668; <code>0</code></td>
<td style="text-align:center"><code>T/C0</code></td>
<td style="text-align:center"><code>000BH</code></td>
</tr>
<tr>
<td style="text-align:center">&#x5916;&#x90E8;&#x4E2D;&#x65AD; <code>1</code></td>
<td style="text-align:center"><span style="text-decoration:overline"><code>INT1</code></span></td>
<td style="text-align:center"><code>0013H</code></td>
</tr>
<tr>
<td style="text-align:center">&#x5B9A;&#x65F6;/&#x8BA1;&#x6570;&#x5668; <code>1</code></td>
<td style="text-align:center"><code>T/C1</code></td>
<td style="text-align:center"><code>001BH</code></td>
</tr>
<tr>
<td style="text-align:center">&#x4E32;&#x884C;&#x53E3;</td>
<td style="text-align:center"></td>
<td style="text-align:center"><code>0023H</code></td>
</tr>
<tr>
<td style="text-align:center">&#x5B9A;&#x65F6;/&#x8BA1;&#x6570;&#x5668; <code>2</code></td>
<td style="text-align:center"><code>T/C2</code></td>
<td style="text-align:center"><code>002BH</code></td>
</tr>
</tbody>
</table>
<blockquote id="fn_1">
<sup>1</sup>. &#x5373;&#x7531; <code>T/Ci</code> &#x901A;&#x8FC7; <code>TFi</code> &#x53D1;&#x51FA;&#x4E2D;&#x65AD;&#x8BF7;&#x6C42;&#xFF0C;&#x6216;&#x8005;&#x7531;&#x7A0B;&#x5E8F;&#x5BF9; <span style="text-decoration:overline"><code>INTi</code></span> &#x8F93;&#x5165;&#x7279;&#x5B9A;&#x7684;&#x7535;&#x5E73;&#xFF08;&#x7531; <code>ITi</code> &#x51B3;&#x5B9A;&#xFF09;&#xFF0C;&#x518D;&#x7531;&#x5355;&#x7247;&#x673A;&#x901A;&#x8FC7; <code>IEi</code> &#x53D1;&#x51FA;&#x4E2D;&#x65AD;&#x8BF7;&#x6C42;&#x3002;<a href="#reffn_1" title="Jump back to footnote [1] in the text."> &#x21A9;</a>
</blockquote>
<blockquote id="fn_&#x6CE8;">
<sup>&#x6CE8;</sup>. &#x6B64;&#x5904;&#x7684; <code>IE</code> &#x4E0E; <code>IP</code> &#x6307;&#x7684;&#x662F; &#x4E2D;&#x65AD;&#x5141;&#x8BB8;&#x5BC4;&#x5B58;&#x5668; &#x548C; &#x4E2D;&#x65AD;&#x4F18;&#x5148;&#x7EA7;&#x5BC4;&#x5B58;&#x5668;&#xFF0C; <code>IE</code> &#x4E0E; <code>IE0</code> / <code>IE1</code> &#x4E0D;&#x662F;&#x540C;&#x4E00;&#x6982;&#x5FF5;&#x3002;<a href="#reffn_&#x6CE8;" title="Jump back to footnote [&#x6CE8;] in the text."> &#x21A9;</a>
</blockquote>
<hr>
<h4 id="&#x5916;&#x90E8;&#x4E2D;&#x65AD;&#x7684;&#x4F7F;&#x7528;&#x65B9;&#x5F0F;">&#x5916;&#x90E8;&#x4E2D;&#x65AD;&#x7684;&#x4F7F;&#x7528;&#x65B9;&#x5F0F;</h4>
<p>&#x5B9A;&#x65F6;/&#x8BA1;&#x6570;&#x5668;&#x7684;&#x4E2D;&#x65AD;&#x8BF7;&#x770B; <a href="&#x5B9A;&#x65F6;&#x8BA1;&#x6570;&#x5668;.html">&#x5B9A;&#x65F6;&#x8BA1;&#x6570;&#x5668;</a>  </p>
<ol>
<li><p>&#x8BBE;&#x7F6E;&#x5806;&#x6808;&#x6307;&#x9488; <code>SP</code> &#x7684;&#x503C;&#xFF08;&#x53EF;&#x7565;&#xFF09;&#xFF1A;</p>
<ul>
<li>&#x56E0;&#x5176;&#x521D;&#x503C; <code>07H</code> &#x4E0E;&#x5DE5;&#x4F5C;&#x5BC4;&#x5B58;&#x5668;&#x7EC4;&#x533A;&#x91CD;&#x53E0;&#xFF0C;&#x82E5;&#x9700;&#x8981;&#xFF0C;&#x987B;&#x91CD;&#x65B0;&#x8BBE;&#x503C;&#xFF1B;<pre><code class="lang-51">MOV     SP, #30H
</code></pre>
</li>
</ul>
</li>
<li><p>&#x5F00;&#x4E2D;&#x65AD;&#x603B;&#x5F00;&#x5173;&#xFF1A;</p>
<pre><code class="lang-51"> SETB        EA
</code></pre>
</li>
<li><p>&#x5B9A;&#x4E49;&#x5916;&#x90E8;&#x4E2D;&#x65AD;&#x65B9;&#x5F0F;&#xFF1A;</p>
<pre><code class="lang-51"> SETB        ITi         ; &#x5B9A;&#x4E49;&#x5916;&#x90E8;&#x4E2D;&#x65AD; <span style="text-decoration:overline"><code>INTi</code></span> &#x4E3A;&#x8D1F;&#x8DF3;&#x53D8;&#x89E6;&#x53D1;
 CLR         ITi         ; &#x5B9A;&#x4E49;&#x5916;&#x90E8;&#x4E2D;&#x65AD; <span style="text-decoration:overline"><code>INTi</code></span> &#x4E3A;&#x4F4E;&#x7535;&#x5E73;&#x89E6;&#x53D1;
</code></pre>
</li>
<li><p>&#x8BBE;&#x7F6E;&#x4E2D;&#x65AD;&#x4F18;&#x5148;&#x7EA7;&#xFF08;&#x53EF;&#x7565;&#xFF09;&#xFF1A;</p>
<pre><code class="lang-51"> SETB        PXi         ; &#x5B9A;&#x4E49;&#x5916;&#x90E8;&#x4E2D;&#x65AD; <span style="text-decoration:overline"><code>INTi</code></span> &#x4E3A;&#x9AD8;&#x4F18;&#x5148;&#x7EA7;
 CLR         PXi         ; &#x5B9A;&#x4E49;&#x5916;&#x90E8;&#x4E2D;&#x65AD; <span style="text-decoration:overline"><code>INTi</code></span> &#x4E3A;&#x4F4E;&#x4F18;&#x5148;&#x7EA7;
</code></pre>
</li>
<li><p>&#x5F00;&#x6307;&#x5B9A;&#x5916;&#x90E8;&#x4E2D;&#x65AD;&#xFF1A;</p>
<pre><code class="lang-51"> SETB        EXi         ; &#x6253;&#x5F00;&#x5916;&#x90E8;&#x4E2D;&#x65AD; <span style="text-decoration:overline"><code>INTi</code></span>
</code></pre>
</li>
<li><p>&#x88C5;&#x5165;&#x4E2D;&#x65AD;&#x5904;&#x7406;&#x7A0B;&#x5E8F;&#xFF1A;</p>
<pre><code class="lang-51"> ORG         0000H
 LJMP        START       ; &#x8F6C;&#x5411;&#x4E3B;&#x7A0B;&#x5E8F;
 ORG         0003H
 LJMP        INTIE0      ; &#x8F6C;&#x5411;&#x5916;&#x90E8;&#x4E2D;&#x65AD;<span style="text-decoration:overline"><code>INT0</code></span> &#x7684;&#x5904;&#x7406;&#x7A0B;&#x5E8F;
 ORG         0013H
 LJMP        INTIE1      ; &#x8F6C;&#x5411;&#x5916;&#x90E8;&#x4E2D;&#x65AD;<span style="text-decoration:overline"><code>INT1</code></span> &#x7684;&#x5904;&#x7406;&#x7A0B;&#x5E8F;
</code></pre>
<p> &#x4E2D;&#x65AD;&#x5904;&#x7406;&#x5B50;&#x7A0B;&#x5E8F; <strong>INTIE0</strong> &#x548C; <strong>INTIE1</strong> &#x7565;&#x53BB;&#x3002;1~5&#x6B65;&#x9700;&#x8981;&#x5728; <strong>START</strong> &#x4E2D;&#x5B8C;&#x6210;&#x3002;</p>
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